300 calories are burned for 60 minutes
<em><u>Solution:</u></em>
Given that, Antonio burns 75 calories for every 15 minutes he rides his bicycle
To find: calories burned if he rides his bicycle for 60 minutes
From given information,
For every 15 minutes, 75 calories is burned
Therefore, for 1 minute,
![1 \text{ minute } = \frac{75}{15} = 5 \text{ calories }](https://tex.z-dn.net/?f=1%20%5Ctext%7B%20minute%20%7D%20%3D%20%5Cfrac%7B75%7D%7B15%7D%20%3D%205%20%5Ctext%7B%20calories%20%7D)
So in 1 minute, 5 calories are burned
We have to find the calories burned for 60 minutes
Let "x" be the calories burned for 60 minutes
1 minute = 5 calories
60 minutes = x calories
This forms a proportion and we can solve the sum by cross multiplying
![x \times 1 = 5 \times 60\\\\x = 300](https://tex.z-dn.net/?f=x%20%5Ctimes%201%20%3D%205%20%5Ctimes%2060%5C%5C%5C%5Cx%20%3D%20300)
Thus 300 calories are burned for 60 minutes
If the wheel does one full turn in 180 cm, that means the wheels circumference is 180. The equation for circumference is:
Circumference = (Pi) x Diameter
(Can't find the symbol for pi)
Now plug in the 180 for the Circumference:
180 = (Pi) x D
Divide by Pi:
57.296 = D
ANSWER:
The diameter is 57 cm
Answer:
50 times
Step-by-step explanation: